The rise of exchange programmes is indeed making a necessity of developing means whereby one can usefully assess a student's skills as well as identify those areas in which they may be, by the standards of what is about to be required of them, a bit deficient.

(It was, of course, quite eye-opening to find that there are indeed Muggles as attached to tradition as some of the staunchest defenders of the oldest of Hogwarts customs. The House or College of Scholars of Merton at the University of Oxford was founded a mere two hundred and seventy years after Hogwarts, as it turns out!)